Exhibit 12.1

Ratio of Earnings to Fixed Charges

	Year Ended December 31,
	2007			2006			2005			2004			2003
	(in millions)
Income before income taxes	$	660		$	377		$	428		$	355		$	39
Equity in losses of equity-method investees		—			—			—			—			—
Net income before equity in losses of equity-method investees		660			377			428			355			39
Plus fixed charges:
Interest expense including amortization of debt issuance costs		77			78			92			107			130
Assumed interest element included in rent expense		17			16			5			4			6
		94			94			97			111			136
Adjusted earnings		754			471			525			466			175
Fixed charges		(94	)		(94	)		(97	)		(111	)		(136	)
Excess of earnings to cover fixed charges	$	660		$	377		$	428		$	355		$	39
Ratio of earnings to fixed charges (1)		8.02			5.01			5.41			4.20			1.29

(1) The ratio of earnings to fixed charges is computed by dividing (i) income (loss) before income taxes and losses from equity interests, plus fixed charges by (ii) fixed charges.